| 落叶松人工林土壤酸度变化与无机磷形态的关系 |
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| 引用本文： | 陈立新.落叶松人工林土壤酸度变化与无机磷形态的关系[J].中国水土保持科学,2005,3(4):108-114. |
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| 作者姓名： | 陈立新 |
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| 作者单位： | 东北林业大学林学院,150040,哈尔滨 |
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| 基金项目： | 国家自然科学基金项目“红松、落叶松人工林土壤质量演变规律研究”（30271070） |
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| 摘 要： | 为了科学地经营落叶松人工林,持续改善其土壤质量和提高林分生产力,研究东北东部山地不同发育阶段落叶松人工林土壤酸度变化,以及活性酸(pH值)、交换性酸和水解性酸与无机磷形态的关系。结果表明:1)随林龄的增大,根际土壤活性酸(pH值)持续降低,根际土壤的交换性酸、交换性铝明显增加,根际土壤Ca-P和O-P与水解性总酸度的相关系数减小,Fe-P与交换性酸、交换性铝的相关系数增大。2)根际土壤活性酸、水解性总酸度变化对根际土壤Al-P含量的变化影响较大,尤其是在幼龄林、近熟林和成熟林二者之间达到了极显著或显著水平;根际土壤Ca-P含量的变化主要受根际土壤活性酸的影响;各年龄阶段根际土壤Fe-P含量与水解性总酸度关系密切;根际土壤O-P含量随着土壤交换性酸、水解性总酸度的增高而降低。3)非根际土壤酸度与非根际土壤无机磷形态的相关性不明显。
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| 关 键 词： | 落叶松人工林 土壤酸度 无机磷 相关性 |
| 收稿时间： | 2004-08-22 |
| 修稿时间： | 2005-07-12 |
Soil acidity change of Larch plantations and relation between change and inorganic phosphorus types |
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| Chen Lixin.Soil acidity change of Larch plantations and relation between change and inorganic phosphorus types[J].Science of Soil and Water Conservation,2005,3(4):108-114. |
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| Authors: | Chen Lixin |
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| Institution: | College of Forestry, Northeast Forestry University, 150040, Ha'rbin, China |
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| Abstract: | In order to manage larch plantations scientifically, improve its soil quality continually and raise stand productivity, soil acidity change of larch plantations at different development stages and their relationship between active acidity (pH value), exchange acidity, hydrolytic acidity and various types of inorganic phosphorus were studied in mountainous area of eastern part of northeastern China. The results showed that, with stand age increasing, active acidity (pH value) in rhizosphere soil decreased continually, but exchange acidity, exchangeable aluminium increased obviously, their correlation coefficient between Ca-P, O-P, and total hydrolytic acidity in rhizosphere soil, respectively, decreased, that between Fe-P, exchange acidity, and exchangeable aluminium respectively increased. The change of active acidity and total hydrolytic acidity in rhizosphere soil greatly influenced Al-P, especially in young stand, near mature stand and mature stand stages, their correlation between active acidity,total hydrolytic acidity, and Al-P respectively, reached significant level or highly significant level. Ca-P change in rhizosphere soil was mainly influenced by active acidity in rhizosphere soil;There was strong correlation between Fe-P and total hydrolytic acidity in rhizosphere soil during various age stages. O-P in rhizosphere soil decreased when exchange acidity and total hydrolytic acidity increased. There was not significant correlation between soil acidity and various forms of inorganic phosphorus in non-rhizosphere soil, respectively. |
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| Keywords: | Larch plantation soil acidity inorganic phosphorus correlation |
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